I think the big issue is that the stuff that already exists has so many features and so many ecosystem integrations, nobody wants to use anything simple enough to DIY.
It would be easier then ever to make a simple address book, but it wouldn't do everything Google does.
The other issue is that we never really got a proper upgrade from spreadsheets. I think you could do a VB-like studio that let average people make modern apps that they'd actually want to use, if it was free, as easy as a spreadsheet, and a cross platform local app, not something self hosted, and had a ton of random features that would interest users.
It would be easier then ever to make a simple address book, but it wouldn't do everything Google does.
The other issue is that we never really got a proper upgrade from spreadsheets. I think you could do a VB-like studio that let average people make modern apps that they'd actually want to use, if it was free, as easy as a spreadsheet, and a cross platform local app, not something self hosted, and had a ton of random features that would interest users.